I have an almost-new old Ardupilot Mega + oilpan for sale. Nothing wrong with it, it's surplus to requirements so hoping someone else can make use of it.
Works perfectly and has no issues. It has the compass soldered onto the board which I will be included.
I have also added pins for the battery monitoring as well as the relay output which all work fine (I used to to turn on lights when the motors armed.
The board costs £200 (pre-soldered and tested) and the compass is a further £40 new. This board is just over three months old.
Make me an offer....
I'll happily post anywhere (buyer to pay cost outside of UK)